Allow using reserved package IDs

Pre-O, the platform treats negative resource IDs [those with
a package ID of 0x80 or higher] as invalid.  In order to work
around this limitation, we allow the use of traditionally
reserved resource IDs [those between 0x02 and 0x7E].

Bug: 78041707
Test: ./out/host/linux-x86/nativetest64/aapt2_tests/aapt2_tests
Test: ./out/host/linux-x86/nativetest/libandroidfw_tests/libandroidfw_tests
Test: Manual. Create a feature split with a package ID of 0x7E and see it runs and can reference base resources.

Change-Id: I3d9782cc05d3a55e1a2467bf39566788847e1160
diff --git a/tools/aapt2/process/SymbolTable.cpp b/tools/aapt2/process/SymbolTable.cpp
index 2e97a2f..fc4c9b5 100644
--- a/tools/aapt2/process/SymbolTable.cpp
+++ b/tools/aapt2/process/SymbolTable.cpp
@@ -227,6 +227,10 @@
   return package_map;
 }
 
+bool AssetManagerSymbolSource::IsPackageDynamic(uint32_t packageId) const {
+  return assets_.getResources(false).isPackageDynamic(packageId);
+}
+
 static std::unique_ptr<SymbolTable::Symbol> LookupAttributeInTable(
     const android::ResTable& table, ResourceId id) {
   // Try as a bag.
@@ -330,6 +334,7 @@
   } else {
     s = util::make_unique<SymbolTable::Symbol>();
     s->id = res_id;
+    s->is_dynamic = table.isResourceDynamic(res_id.id);
   }
 
   if (s) {
@@ -354,7 +359,6 @@
     // Exit early and avoid the error logs from AssetManager.
     return {};
   }
-
   const android::ResTable& table = assets_.getResources(false);
   Maybe<ResourceName> maybe_name = GetResourceName(table, id);
   if (!maybe_name) {
@@ -370,6 +374,7 @@
   } else {
     s = util::make_unique<SymbolTable::Symbol>();
     s->id = id;
+    s->is_dynamic = table.isResourceDynamic(id.id);
   }
 
   if (s) {